Touch operation issues

Hello.

The sample ModelViewer is operated by touch.

Open \Models\obj\wall12.obj.

After expanding wall12.obj,

Even if you move your finger over this model, you cannot rotate or zoom in smoothly.

With mouse operation, you can rotate and zoom smoothly.

It seems that OnManipulationDelta() of CameraController.cs is hard to occur. . .

\Models\obj\leone.3DBuilder.obj can be rotated and enlarged smoothly by touch operation.

I want to rotate and zoom in smoothly even with touch operation.

Please tell me how.

Thank you.